If you're wondering whether a 3D massage chair, 4D massage chair, or 5D massage chair is best for you, here's the quick answer: A 3D massage chair is great for deep tissue massage and costs less. A 4D massage chair feels closer to a real massage and lets you control speed and intensity. A 5D massage chair adds more rhythm and smart tech for the smoothest, most advanced massage. ... https://humancarei.com/product-category/full-body-massage-chair/